Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets:
Tax basis of loans in excess of financial statement basis	$ 19,474	$ 15,607
Recognized for financial reporting purposes but not yet for tax purposes: Deferred compensation	3,303	2,933
Net unrealized loss on investment securities available-for-sale	142,276	0
Other deferred tax assets	1,038	831
Total deferred tax assets	166,091	19,371
Deferred tax liabilities:
Financial statement basis of fixed assets in excess of tax basis	6,019	6,178
Intangible asset amortization deductible for tax purposes, but not for financial reporting purposes	13,866	13,594
Recognized for financial reporting purposes but not yet for tax purposes - accretion on investment securities	644	499
Net unrealized gain on investment securities available-for- sale	0	26,384
Other deferred tax liabilities	51	69
Total deferred tax liabilities	20,580	46,724
Net deferred tax asset (liability)	$ (145,511)	$ (27,353)